| Preposition | Use |
|---|
| in | in months |
in May |
|---|---|---|
years |
in 1982 |
|
seasons |
in autumn |
|
parts of the day |
in the morning; in the afternoon; in the evening |
|
duration |
in a month |
| at | parts of the day |
at night |
|---|---|---|
time of day |
at 8 o'clock; at midnight |
|
celebrations |
at Christmas; at Easter |
| on | days of the week |
on Sunday; on Friday |
|---|---|---|
date |
on 21st May |
| after | later than something takes place |
after work |
|---|
| ago | how long ago something took place |
2 years ago |
|---|
| before | earlier than something takes place |
before my birthday |
|---|
| between | considering two points in time |
between Monday and Thursday |
|---|
| by | not later than a certain time |
by Friday |
|---|
| during | Considering a period of time (whole period) |
during the week |
|---|
| for | period of time |
for 2 months |
|---|
| from ... to |
From one point to another |
from Monday to Friday |
|---|
| since | point of time |
since 1995 |
|---|
| until/’til | no later than a certain point in time |
until tomorrow |
|---|
| up to | not more than a certain point in time |
up to 6 hours a day |
|---|
| within | during a particular period of time |
within a week |
|---|
I have an appointment at 9am.
Discos open at midnight.
Classes start in September.
We will probably live on Mars in the future!
Do you work on Saturdays?
Her birthday is on 21 st November.
I always watch TV at night.
I don't usually work at the weekend.
I stay with my relatives at Christmas.
We finished at the same time.